This modest little building is the Kingdom Hall of Jehovah's Witnesses.
The Witnesses take their name seriously by going door-to-door to talk about their faith and hand out copies of The Watchtower. More power to them for that; I couldn't do it.
When I was a kid and the Witnesses came to the door, my mom would always invite them in. However, she put a caveat on the visit: she would listen to their talk, but first they would have to join her in saying the rosary.
No one took her up on it.